uvm_fault(0xfffffd80669d6990, 0x4, 0, 1) -> e kernel: page fault trap, code=0 Stopped at igmp_leavegroup+0x80: movl 0x4(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND igmp_leavegroup(ffff800000c26c80) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c26c80) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff8000006c3f90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3ba980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd807b060e28) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd807b060e28,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8065317268,ffff80002168da50) at soo_close+0x40 fdrop(fffffd8065317268,ffff80002168da50) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8065317268,ffff80002168da50) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002168da50) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002168da50,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002168da50,ffff8000230e7480,ffff8000230e74e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000230e7550) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9860, count: 1 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xfffffd80669d6990, 0x4, 0, 1) -> e ddb> trace igmp_leavegroup(ffff800000c26c80) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c26c80) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff8000006c3f90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3ba980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd807b060e28) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd807b060e28,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8065317268,ffff80002168da50) at soo_close+0x40 fdrop(fffffd8065317268,ffff80002168da50) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8065317268,ffff80002168da50) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002168da50) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002168da50,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002168da50,ffff8000230e7480,ffff8000230e74e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000230e7550) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9860, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000230e7100 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0 r9 0 r10 0x92e9b6e04fde36f8 r11 0xc776a647db13f867 r12 0 r13 0x3 r14 0xffff8000006b5000 r15 0xffff800000c26c80 rip 0xffffffff81ce3f00 igmp_leavegroup+0x80 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000230e70d0 ss 0x10 igmp_leavegroup+0x80: movl 0x4(%rax),%r12d ddb> show proc PROC (syz-executor.5) pid=65388 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff80002168c7f0,0xffff80002168c020 process=0xffff800021627b78 user=0xffff8000230e2000, vmspace=0xfffffd80669d6990 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86405 170873 9187 0 2 0 syz-executor.6 86405 10252 9187 0 2 0x4000000 syz-executor.6 86405 377602 9187 0 2 0x4000000 syz-executor.6 30344 375309 26020 0 3 0x80 nanoslp syz-executor.3 30344 418991 26020 0 3 0x4000080 poll syz-executor.3 30344 331931 26020 0 2 0x4000000 syz-executor.3 30344 425512 26020 0 3 0x4000080 fsleep syz-executor.3 28387 240941 0 0 3 0x14280 nfsidl nfsio 26992 482221 0 0 3 0x14280 nfsidl nfsio 90089 229122 0 0 3 0x14280 nfsidl nfsio 18283 168731 0 0 3 0x14280 nfsidl nfsio 99596 140677 0 0 3 0x14280 nfsidl nfsio 66299 513658 0 0 3 0x14280 nfsidl nfsio 35472 115547 9750 0 3 0x82 nanoslp syz-executor.2 58014 98688 0 0 3 0x14200 acct acct 3987 193219 1 0 3 0x100083 ttyin getty 29111 48318 9750 0 3 0x82 nanoslp syz-executor.1 26020 13842 9750 0 3 0x82 nanoslp syz-executor.3 45193 398340 9750 0 2 0x2 syz-executor.7 97464 284722 9750 0 3 0x82 nanoslp syz-executor.5 35099 204831 9750 0 2 0x2 syz-executor.4 747 316898 0 0 3 0x14200 bored sosplice 9187 271173 9750 0 3 0x82 nanoslp syz-executor.6 97768 33914 9750 0 3 0x82 nanoslp syz-executor.0 9750 431252 37965 0 3 0x82 thrsleep syz-fuzzer 9750 121140 37965 0 3 0x4000082 nanoslp syz-fuzzer 9750 418790 37965 0 3 0x4000082 kqread syz-fuzzer 9750 125396 37965 0 3 0x4000082 thrsleep syz-fuzzer 9750 444952 37965 0 3 0x4000082 thrsleep syz-fuzzer 9750 305981 37965 0 3 0x4000082 thrsleep syz-fuzzer 9750 421699 37965 0 3 0x4000082 thrsleep syz-fuzzer 9750 461101 37965 0 3 0x4000082 thrsleep syz-fuzzer 9750 371796 37965 0 3 0x4000082 thrsleep syz-fuzzer 37965 480767 14271 0 3 0x10008a sigsusp ksh 14271 85279 79451 0 3 0x9a poll sshd 79451 45239 1 0 3 0x88 poll sshd 63382 94650 6515 73 3 0x100090 kqread syslogd 6515 162005 1 0 3 0x100082 netio syslogd 57557 74292 1 0 3 0x100080 kqread resolvd 10820 300334 96927 77 3 0x100092 kqread dhcpleased 92456 282341 96927 77 3 0x100092 kqread dhcpleased 96927 371260 1 0 3 0x80 kqread dhcpleased 36692 29450 0 0 3 0x14200 bored smr 66566 251742 0 0 2 0x14200 zerothread 24449 477177 0 0 3 0x14200 aiodoned aiodoned 49615 158745 0 0 3 0x14200 syncer update 25236 319785 0 0 3 0x14200 cleaner cleaner 56988 309544 0 0 3 0x14200 reaper reaper 17654 40406 0 0 3 0x14200 pgdaemon pagedaemon 97493 85334 0 0 3 0x14200 bored viomb 86754 213826 0 0 3 0x40014200 acpi0 acpi0 23583 482180 0 0 3 0x14200 bored softnet 78875 350182 0 0 3 0x14200 bored systqmp 32671 272294 0 0 3 0x14200 bored systq 69121 114223 0 0 3 0x40014200 bored softclock 36863 309497 0 0 3 0x40014200 idle0 1 251540 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10186 6416K 6997K 78643K 17087 0 pcb 13 16K 18K 78643K 443 0 rtable 215 9K 11K 78643K 1454 0 ifaddr 89 19K 19K 78643K 564 0 sysctl 3 1K 1K 78643K 3 0 counters 28 17K 17K 78643K 89 0 ioctlops 0 0K 4K 78643K 1215 0 iov 0 0K 24K 78643K 312 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1476 92K 92K 78643K 3816 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 31 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 523 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 14 49K 81K 78643K 3928 0 sigio 0 0K 0K 78643K 91 0 proc 60 55K 87K 78643K 1029 0 subproc 104 13K 13K 78643K 299 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 2 0K 0K 78643K 175 0 in_multi 78 5K 7K 78643K 473 0 ether_multi 1 0K 0K 78643K 56 0 mrt 0 0K 0K 78643K 18 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 1356 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 368 397K 398K 78643K 48957 0 UVM aobj 90 3K 3K 78643K 96 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 244 0 NDP 13 0K 1K 78643K 139 0 temp 137 4693K 4773K 78643K 62418 0 kqueue 10 14K 22K 78643K 534 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 258 0 255 4 3 1 2 0 8 0 rtentry 112 335 0 245 4 0 4 4 0 8 0 unpcb 136 7509 0 7492 43 38 5 8 0 8 4 syncache 296 26 0 26 6 5 1 1 0 8 1 tcpqe 32 49 0 49 4 3 1 1 0 8 1 tcpcb 736 1512 0 1500 67 60 7 30 0 8 4 arp 88 48 0 32 1 0 1 1 0 8 0 ipq 40 8 0 8 2 1 1 1 0 8 1 ipqe 40 270 0 270 2 1 1 1 0 8 1 inpcb 304 3684 0 3674 53 46 7 14 0 8 6 rttmr 72 6 0 6 2 2 0 1 0 8 0 ip6q 72 9 0 8 4 3 1 1 0 8 0 ip6af 40 16 0 15 4 3 1 1 0 8 0 nd6 48 94 0 71 1 0 1 1 0 8 0 pkpcb 40 41 0 41 1 1 0 1 0 8 0 kcovpl 48 23 0 15 1 0 1 1 0 8 0 ppxss 1152 8 0 8 2 2 0 1 0 8 0 pfstscr 40 9 0 6 1 0 1 1 0 8 0 pfrke_plain 168 18 0 18 2 2 0 1 0 8 0 pfrktable 1344 163 0 157 4 3 1 1 0 8 0 pftag 88 29 0 24 1 0 1 1 0 8 0 pfqueue 264 4 0 0 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 112 16 0 12 1 0 1 1 0 8 0 pfstate 320 10 0 8 1 0 1 1 0 8 0 pfrule 1360 206 0 62 16 4 12 13 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1450 0 1032 38 10 28 29 0 8 0 art_table 32 1451 0 1032 4 0 4 4 0 8 0 art_node 16 334 0 254 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semapl 112 521 0 511 1 0 1 1 0 8 0 shmpl 112 93 0 6 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6826 0 5372 91 0 91 91 0 8 0 ffsino 240 6826 0 5372 86 0 86 86 0 8 0 nchpl 144 12066 0 10446 63 0 63 63 0 8 0 rtmask 32 12 0 12 1 1 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 46083 0 46083 2 1 1 2 0 8 1 vcpupl 1984 53 0 0 7 0 7 7 0 8 0 vmpool 528 66 0 13 6 2 4 4 0 8 0 pfiaddrpl 120 90 0 49 5 3 2 2 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 35491 0 35491 16 15 1 8 0 8 1 plimitpl 152 510 0 496 1 0 1 1 0 8 0 sigapl 424 4236 0 4190 10 3 7 8 0 8 0 futexpl 64 41618 0 41617 1 0 1 1 0 8 0 knotepl 112 2857 0 2783 3 0 3 3 0 8 0 kqueuepl 184 2090 0 2084 24 23 1 7 0 8 0 pipepl 304 676 0 648 16 13 3 8 0 8 0 fdescpl 432 4174 0 4149 4 0 4 4 0 8 0 filepl 120 37083 0 36842 49 35 14 18 0 8 4 lockfpl 104 700 0 698 2 1 1 2 0 8 0 lockfspl 48 217 0 215 1 0 1 1 0 8 0 sessionpl 144 40 0 24 1 0 1 1 0 8 0 pgrppl 48 61 0 45 1 0 1 1 0 8 0 ucredpl 96 4453 0 4442 1 0 1 1 0 8 0 zombiepl 144 4192 0 4188 1 0 1 1 0 8 0 processpl 1000 4236 0 4188 11 4 7 9 0 8 0 procpl 672 10262 0 10201 12 5 7 8 0 8 0 sosppl 168 32 0 32 6 6 0 1 0 8 0 sockpl 448 11493 0 11463 181 169 12 33 0 8 8 mcl64k 65536 417 0 417 6 5 1 1 0 8 1 mcl16k 16384 59 0 59 11 10 1 1 0 8 1 mcl12k 12288 139 0 139 6 5 1 1 0 8 1 mcl9k 9216 56 0 56 8 8 0 1 0 8 0 mcl8k 8192 375 0 375 8 7 1 1 0 8 1 mcl4k 4096 369 0 369 2 1 1 1 0 8 1 mcl2k2 2112 27 0 27 10 10 0 1 0 8 0 mcl2k 2048 86772 0 86720 20 12 8 11 0 8 0 mtagpl 96 569 0 487 9 6 3 7 0 8 0 mbufpl 256 177876 0 177458 78 44 34 61 0 8 3 bufpl 288 11248 0 4843 458 0 458 458 0 8 0 anonpl 24 1122725 0 1101853 195 62 133 150 0 188 1 amapchunkpl 152 120719 0 119940 76 41 35 45 0 158 1 amappl16 200 11445 0 10674 73 30 43 52 0 8 0 amappl15 192 969 0 963 1 0 1 1 0 8 0 amappl14 184 43 0 39 1 0 1 1 0 8 0 amappl13 176 370 0 367 1 0 1 1 0 8 0 amappl12 168 868 0 864 2 1 1 1 0 8 0 amappl11 160 57 0 44 1 0 1 1 0 8 0 amappl10 152 1114 0 1107 1 0 1 1 0 8 0 amappl9 144 629 0 625 1 0 1 1 0 8 0 amappl8 136 1359 0 1287 3 0 3 3 0 8 0 amappl7 128 648 0 637 1 0 1 1 0 8 0 amappl6 120 424 0 401 2 1 1 2 0 8 0 amappl5 112 4800 0 4785 1 0 1 1 0 8 0 amappl4 104 1229 0 1204 2 0 2 2 0 8 0 amappl3 96 1269 0 1254 1 0 1 1 0 8 0 amappl2 88 1723 0 1668 3 1 2 3 0 8 0 amappl1 80 75851 0 75322 18 5 13 18 0 8 0 amappl 88 48156 0 47919 9 2 7 7 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 95 0 6 2 0 2 2 0 8 0 uaddrrnd 24 4240 0 4162 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4240 0 4162 1 0 1 1 0 8 0 vmmpekpl 168 32882 0 32822 4 0 4 4 0 8 0 vmmpepl 168 387963 0 385313 205 74 131 149 0 357 0 vmsppl 272 4239 0 4162 7 1 6 6 0 8 0 rwobjpl 24 96628 0 88894 48 0 48 48 0 8 0 pdppl 4096 8486 0 8377 315 198 117 117 0 8 8 pvpl 32 1969811 0 1946390 300 97 203 244 0 265 2 pmappl 216 4239 0 4162 5 0 5 5 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1393 0 524 26 0 26 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace igmp_leavegroup(ffff800000c26c80) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c26c80) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff8000006c3f90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3ba980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd807b060e28) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd807b060e28,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8065317268,ffff80002168da50) at soo_close+0x40 fdrop(fffffd8065317268,ffff80002168da50) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8065317268,ffff80002168da50) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002168da50) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002168da50,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002168da50,ffff8000230e7480,ffff8000230e74e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000230e7550) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9860, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace igmp_leavegroup(ffff800000c26c80) at igmp_leavegroup+0x80 sys/netinet/igmp.c:521 in_delmulti(ffff800000c26c80) at in_delmulti+0xb7 sys/netinet/in.c:920 ip_freemoptions(ffff8000006c3f90) at ip_freemoptions+0x4d sys/netinet/ip_output.c:1764 in_pcbdetach(fffffd806f3ba980) at in_pcbdetach+0xf3 sys/netinet/in_pcb.c:584 udp_detach(fffffd807b060e28) at udp_detach+0x3b sys/netinet/udp_usrreq.c:1263 soclose(fffffd807b060e28,0) at soclose+0x245 sys/kern/uipc_socket.c:361 soo_close(fffffd8065317268,ffff80002168da50) at soo_close+0x40 fdrop(fffffd8065317268,ffff80002168da50) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd8065317268,ffff80002168da50) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80002168da50) at fdfree+0xf3 sys/kern/kern_descrip.c:1195 exit1(ffff80002168da50,0,0,1) at exit1+0x35d sys/kern/kern_exit.c:202 sys_exit(ffff80002168da50,ffff8000230e7480,ffff8000230e74e0) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff8000230e7550) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc9860, count: -14